US3598423A - Level-regulating valve of the piston valve type particularly for use with road vehicles - Google Patents

Level-regulating valve of the piston valve type particularly for use with road vehicles Download PDF

Info

Publication number
US3598423A
US3598423A US3598423DA US3598423A US 3598423 A US3598423 A US 3598423A US 3598423D A US3598423D A US 3598423DA US 3598423 A US3598423 A US 3598423A
Authority
US
United States
Prior art keywords
piston valve
level
valve
housing
linkage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Other languages
English (en)
Inventor
Willi Clarenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Langen and Co
Original Assignee
Langen and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Langen and Co filed Critical Langen and Co
Application granted granted Critical
Publication of US3598423A publication Critical patent/US3598423A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/056—Regulating distributors or valves for hydropneumatic systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/86702—With internal flow passage

Definitions

  • a level-regulating valve of the piston valve type for road vehicles which, in dependence upon the distance variations between sprung and unsprung bodies, connects a pressure space of an adjusting component positioned between such bodies in a first regulating position with a source of pressure, in a second regulating position with a discharge and in a third regulating position which corresponds to the level position of the vehicle a blockage of such connections with the distance variations being transmitted via linkages to the levelregulating valve.
  • the problem is solved in that ro tary movement is imparted to a piston valve by a linkage with a thread or threadlike guide being arranged on the piston valve so that the piston valve, in addition to its rotary movement, executes an axially directed translatory movement in cooperation with a corresponding thread or guide in the valve housing, or a guide element which is immovable axially by the piston valve relative to the valve housing.
  • a guide element which can be rotated relative to the valve housing and to the piston valve by means of an additional linkage, Bowden wire, etc. is provided for the random preselection of a level.
  • the guide element is preferably immovable in the axial direction in the valve housing or at least possesses a different pitch relative to the valve housing than relative to the piston valve.
  • the piston valve With a rigid linkage it is possible to make the piston valve of two parts which can be displaced in the axial direction relative to each other but not rotated, with the part provided for controlling the pressure medium being guided relative to the valve housing while the other part is not capable of axial displacement.
  • the diameters of the waists of the piston valve are, in a known manner, only slightly smaller at one point of the effective flow cross section than the diameters of the shoulders of the piston.
  • the linkage can be fixed'in any angular position with respect to the piston valve by clamping or the like.
  • a movement of the adjusting member to their end stops can be accomplished by displacing or turning the guide element such that the maximum axial movement of the piston valve that cari be achieved by the rotary movement of the linkage is insufficient to block the connection for the pressure medium provided by a displacement or rotation of the guide element.
  • FIG. I is a fragmentary view diagrammatically illustrating the components constituting a level-regulating device
  • FIG. 2 is a view partly in cross section and partly in elevation of a level-regulating valve embodying the present invention
  • FIG. 3 is a fragmentary view partly in cross section and partly in elevation of a part of a valve provided with a two-part piston
  • FIG. 4 is a view partly in cross section and partly in elevation of an arrangement for adjusting any vertical position of the vehicle
  • FIG. 5 is a fragmentary view partly in elevation and partly in cross section of another embodiment of the invention illustrated in FIG. 4.
  • a wheel 1 ofa vehicle (not illustrated) is suitably secured to an axle or guide rod 2 which supports a leg of a fluid pressure unit 4 operably connected to a vehicle body 5 with a pressure space 3 being provided above the piston of the leg.
  • a level-regulating valve 6 is also affixed to the vehicle body 5 and is actuated by means of a linkage 7 which is suitably secured to the axle 2.
  • the level-regulating valve is provided with three ports namely, ports A, T, and P.
  • the port A is connected with the pressure space 3, the port P with a source of pressure 8 and the port T with a discharge or drain 9.
  • the piston valve is provided with two waists I6 and I7 and the waists are separated'by a shoulder 15 in the area in which the ports P and T communicate with the bore 11.
  • the bore A is in communication with an annular duct 18 which is closed in the level position of the vehicle toward the bore 11 by means of the shoulder 15.
  • the waists I6 and 17 in the range of their effective cross section are provided with at least one point 19 and 20 at which their diameter is slightly less than that of the shoulder 15.
  • a thread 21 of the valve 13 coacts with a corresponding thread in the housing 10 or a pin 22 engaging the thread 21 and secured on the housing 10 (illustrated diagrammatically only by the projection of the pin on the valve 13) to effect a longitudinal movement of the piston valve I3.
  • the active control edges of the shoulder I5 are denoted 23 and 24.
  • a piston valve including two parts 25 and 26.
  • the part 25 is provided with a thread 27 which is engaged by a pin 28 (diagrammatically illustrated as a projection) and the part 26 is provided with a shoulder 29 which is axially held by a cover or lid 30.
  • the part 25 is formed with a recess 3I which is engaged by an axially moving lug 32 of the part 26 and a linkage 33 which can be rigid is utilized to impart rotation to the part 26.
  • the housing I0 is provided with a bore II which is closed at one end by a closure plug 12'.
  • a piston valvc I3 is positioned in the bore 11'.
  • the bore II widens into a threaded bore 34 which in turn merges with a widened bore 35.
  • a guide element 36 is threaded into the bore 34 and the guide element 36 is provided with a longitudinal bore 37 in which a portion of the piston valve 13' is disposed.
  • a pin 22' is also secured in the guide element 36 and the guide element 36 can be rotated by means of a Bowden wire 39 which operates against a return spring 38.
  • the piston valve 13' is provided with two waists I6 and I7 separated by a shoulder IS in the area of the bores P and T which communicate with the bore 11'.
  • the waists 16' and 17' in the area of their effective cross section have at least one point 19 and 20 at which their diameter is slightly less than that of the shoulder 15.
  • a thread 21' for the valve 13 coacts with a corresponding thread in the housing
  • the active control edges of the shoulder are denoted 23' and 24'.
  • FIG. 5 it will be seen that a bore 11" widens into a bore 40 and a guide element 42 provided with a collar 41 is disposed in the bore 40.
  • the collar 41 is lodged or located between the housing 10" and a cover or lid 43 and consequently, the collar cannot move in the axial direction.
  • a pin 22" secured in the guide element 42 engages a thread 21" of piston valve 13".
  • a lever or Bowden wire 44 which is received in a recess 45 of the cover 43 serves as component for operating the guide element 42.
  • the alignment of the vehicle in a certain level position can be effected quite simply by manually adjusting the piston valve 13 upon loosening of the clamping screw 14 such as by means of a wrench until it corresponds to the desired level position. Thereafter the linkage is again secured.
  • the linkage 7 must follow the axial displacement of the piston valve 13, the linkage should be flexible at least over part of its length or, as illustrated in FIG. 1, be suspended in a flexible fashion.
  • this valve embodies a device for setting any desired level position and such device essentially includes the guide element 36 rotatably mounted in the housing 10'.
  • a rotary movement of the guide element 36 causes, by means of thread 34, an axial displacement thereof and assuming the threads 34 and 21' possess different pitches, the piston valve 13' is also displaced axially via pin 22 so that. dependent upon the direction of rotation of the guide element 36, communication between bore P, bore 11 and bore A or bore P, bore 11 and bore '1 is established. Consequently, the distance between the vehicle body 5 and the axle 2 is thereby shortened or lengthened.
  • Such a measure is desired, for example, in commercial vehicles such as truck cranes which should be softly sprung during riding con ditions but where, on the other hand, a possible rigid connection between the body and the wheels is desired during the hoisting of loads for reducing the tendency for the vehicle to tip or tilt.
  • the piston valves can be of different structural detail such as for example, with only two shoulders.
  • the actuation of the guide element can be selected as freely as the fastening of the linkage to the piston valves and lastly, the invention is also suitable for pneumatic shock absorbers, hydropneumatic or mechanical resilient suspensions provided with adjusting members arranged either ahead of or behind the same.
  • a level-regulating valve of the piston valve type for vehicles which is adapted to connect, dependent upon the distance variations between sprung and unsprung bodies, a fluid pressure chamber of an adjusting means, arranged between the bodies, in a first regulating position, with a source of pressure fluid, in a second regulating position with a discharge and in a third regulating position corresponding to the level position of the vehicle to block such connections, and linkage means for transmitting the distance variations to the level-regulating valve
  • the improvement comprising a housing, said housing having first and second axially spaced ports, both of which communicate with the interior thereof and one each with the source of pressure fluid and the discharge, and a third port intermediate the first and second ports communicating with the fluid pressure chamber and an annular duct within the housing, a piston valve mounted for axial movement within the housing, said piston valve having a shoulder which, in the level position of the vehicle closes the annular duct and a waist portion of lesser diameter than the shoulder, means connecting the linkage means to the piston valve for imparting rotary movement to the piston
  • the level-regulating valve as claimed in claim 1 including a guide element positioned in said housing for rotation relative to the housing and piston valve, additional linkage means for rotating the guide element, said guide element having thread means of a different pitch than the thread means of the housing and the piston valve and at least a portion of said piston valve being mounted in said guide element.
  • the level-regulating valve as claimed in claim 1 including clamping means for fixing the linkage means in any desired angular position with respect to the piston valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vehicle Body Suspensions (AREA)
US3598423D 1968-12-17 1969-02-11 Level-regulating valve of the piston valve type particularly for use with road vehicles Expired - Lifetime US3598423A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19681815120 DE1815120A1 (de) 1968-12-17 1968-12-17 Niveauregelventil der Kolbenschieberbauart fuer Fahrzeuge
FR182883 1968-12-31
GB313169A GB1254174A (en) 1968-12-17 1969-01-20 Device for controlling the level of a vehicle
US79835969A 1969-02-11 1969-02-11

Publications (1)

Publication Number Publication Date
US3598423A true US3598423A (en) 1971-08-10

Family

ID=27430819

Family Applications (1)

Application Number Title Priority Date Filing Date
US3598423D Expired - Lifetime US3598423A (en) 1968-12-17 1969-02-11 Level-regulating valve of the piston valve type particularly for use with road vehicles

Country Status (4)

Country Link
US (1) US3598423A (enrdf_load_stackoverflow)
DE (1) DE1815120A1 (enrdf_load_stackoverflow)
FR (1) FR1600291A (enrdf_load_stackoverflow)
GB (1) GB1254174A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923240A (en) * 1974-08-16 1975-12-02 Lucas Aerospace Ltd Land vehicle wheel suspension arrangement
US6412790B2 (en) 1998-08-31 2002-07-02 Holland Neway International, Inc. Vehicle suspension and rotary height control valve for same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1403105A (en) * 1971-07-08 1975-08-13 Aisin Seiki Hydraulic modulator valve
DE2932298A1 (de) * 1979-08-09 1981-02-26 Barmag Barmer Maschf Hydraulisches niveauregelventil fuer kraftfahrzeugfederungen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925284A (en) * 1957-03-07 1960-02-16 Ford Motor Co Motor vehicle air suspension system
US3026103A (en) * 1959-04-20 1962-03-20 Bendix Westinghouse Automotive Valve mechanism for vehicle air springs
US3032065A (en) * 1959-09-09 1962-05-01 Jolley Leonard Pneumatic cylinder control
US3099461A (en) * 1957-07-26 1963-07-30 Weatherhead Co Suspension control valve
US3280842A (en) * 1965-02-19 1966-10-25 New York Air Brake Co Valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925284A (en) * 1957-03-07 1960-02-16 Ford Motor Co Motor vehicle air suspension system
US3099461A (en) * 1957-07-26 1963-07-30 Weatherhead Co Suspension control valve
US3026103A (en) * 1959-04-20 1962-03-20 Bendix Westinghouse Automotive Valve mechanism for vehicle air springs
US3032065A (en) * 1959-09-09 1962-05-01 Jolley Leonard Pneumatic cylinder control
US3280842A (en) * 1965-02-19 1966-10-25 New York Air Brake Co Valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923240A (en) * 1974-08-16 1975-12-02 Lucas Aerospace Ltd Land vehicle wheel suspension arrangement
US6412790B2 (en) 1998-08-31 2002-07-02 Holland Neway International, Inc. Vehicle suspension and rotary height control valve for same

Also Published As

Publication number Publication date
GB1254174A (en) 1971-11-17
DE1815120A1 (de) 1970-06-25
FR1600291A (enrdf_load_stackoverflow) 1970-07-20

Similar Documents

Publication Publication Date Title
US5620194A (en) Self-steering suspension lockout mechanism
US3396984A (en) Anti-roll devices for automatic vehicles
US2702529A (en) Valve adapted for hydraulic power steering uses
US4786034A (en) Apparatus for damping courses of movement
US4206934A (en) Control valve mechanism for an air spring vehicle suspension
GB2135020A (en) Vehicle suspension unit with damping and spring rate adjustable in response to suspension extension
EP0349584B1 (en) Vehicle suspension system
WO1993004884A1 (en) Switchable roll-stabilizer bar
US2939723A (en) Motor vehicle air suspension system having adjustable valve control
US3598423A (en) Level-regulating valve of the piston valve type particularly for use with road vehicles
US2490719A (en) Automobile stabilizer
US2970614A (en) Control device for vehicle suspension
US3091257A (en) Air suspension systems for vehicles
US2718285A (en) Remotely adjustable shock absorber
US3933368A (en) Levelling valves
US2986404A (en) Control valve for air suspension system
US4445725A (en) Vehicle hydraulic brake system and apparatus
US3084002A (en) Braking power distributors
US4077617A (en) Vehicle leveling valve device with dampening arrangement
US2162292A (en) Hydraulic shock absorber or the like damping means
GB2186659A (en) A vibration damper for vehicles
JPS58116212A (ja) 減衰力調整式シヨツクアブソ−バ
US2046889A (en) Shock absorber
US2945700A (en) Fluid suspension having quick centering control for electrically actuated valves
US1956383A (en) Shock absorber